MATH 30 PRE-ALGEBRA
RIO HONDO COLLEGE
INSTRUCTOR: Ian McCance
TICKET #, TIME AND ROOM:
SPRING 2012
EMAIL : imccance@yahoo.com
31268
TTH
1:30-3:35am
S303
PREREQUISITES: Math 20 with grade of C or higher (or equivalent), or appropriate skill level asdeterme
Chapter 8
%
PER 100
27%
27 PER 100
Shade 3%
PARTS PER 100 PARTS
27
PARTS PER 100 PARTS
Shade 40%
100
27
100
Shade 57%
Shade 112%
Show me three different ways to shade 25%
Show me three different ways to shade 50%
1
Fraction
%
PER 100
27%
27 PER 100
33%
PE
Chapter 7
g-grams, unit measure of weight
m-meters, unit measure of length
l-liters, unit measure of volume
1) find 3 cm, 2 cm, 35mm, 60mm, 105mm, 1dm, 1.1dm, 2.5cm, 0.5cm
One liter of coke. The amount of liquid the bottle holds has a volume of 1 liter.
O
Chapter 6 Linear Equations
Question: Is 1 a solution to
3x 4 7 ?
_why?_
SIMPLE EQUATIONS:
X 3 2
2 X 4
X
3
2
3 X 15
Try:
X 7 2
x 5 4
8 X 24
2
X
7
BASIC EQUATIONS:
1) Isolate the x
(xs on one side, non xs on the other)
(add and subtract)
3x 6 18
x 5 7
2)
Chapter 5
Multiplying with variables
Multiply the numbers and write the letters
32 x
2 x3 y
4s3
3x 2 y
3x 2 y 4s3
5r 2 3 ys
5r 2 3rs
4s3 3x 2 y
DISTRIBUTING
3x 2
52 x 1
x 2
53x 2
5r 6 2
Expressions
Expressions do not have an equal sign.
Expressio
Chapter 4
123.456789
Give the place value of the 3
a) 12.351
b) 1.43
c)- 30.002
d) 0.123456
What is the difference between "twenty one year olds" and "twenty-one year olds" ?
What is the difference between "six ten thousandths" and "six ten-thousandths"?
Math 40 Exam 1 Review NO WORK=NO CREDIT
You may not use a calculator on this exam. Circle or box you answer. Write neatly Show all work.
1. a)Express four million, nine thousand, two hundred six in standard form:
b) Write 2,000,093 in written form:
2. Rou
Math 30 test 4 review:
1. Write 15 minutes to one hour as a ratio.
2. Write 75 ounces in 2 hours as a rate.
3. Write 100 miles in 5 hours as a unit rate.(per)
4. Comparison shopping. A 30-pound bag of fertilizer costs $12.25, an 80-pound bag costs $30.25,
FINDING THE LCM AND GCF
LCM
GCF
Least Common Multiple
Greatest Common Factor
LCM is the smallest multiple that two or more numbers share.
2
3
4
5
6
4
8
12
16
20
24
10
20
30
40
50
The LCM is 20 here
60
GCF is the greatest factor that two or more numbers sh